Cube is a headless BI platform that aims to provide developers with a consistent, performant, and secure way to access all of their data. The goal is to support multiple data sources and make them compatible with a wide range of downstream tools. This is achieved through Cube's Postgres-compliant SQL API, which allows users to connect various query engines and front-end frameworks to their data sources. The platform's values include open standards, flexibility, and the power of a broad ecosystem, making it an attractive solution for developers who want to curate their stack with any data source and downstream tools they choose.